[OSM-talk] osmarender slippy map rendering
Andy Robinson
Andy_J_Robinson at blueyonder.co.uk
Thu Apr 26 10:13:26 BST 2007
>-----Original Message-----
>From: talk-bounces at openstreetmap.org [mailto:talk-
>bounces at openstreetmap.org] On Behalf Of Lars Aronsson
>Sent: 26 April 2007 9:42 AM
>To: OSM
>Subject: Re: [OSM-talk] osmarender slippy map rendering
>
>80n wrote:
>
>> This is an intentional style. As you zoom in place-names get
>> bigger but also become semi-transparent. At some level they
>> become invisible, ideally when the extent of the place is larger
>> than the viewport.
>
>I like this, but there are two things to wish for:
>
>1. The current definition of a place=city is one with more than
>100,000 inhabitants. This Malmö, Helsinki, Cambridge, Oxford and
>a lot of places. But we should need another level for places
>bigger than 1 million inhabitants like Copenhagen, Riga, London
>and Berlin. The current city names look small for these places.
>
It would seem logical to add a capital_city=true tag to London et al and
have the renders pick that up and adjust the look.
Cheers
Andy
Andy Robinson
Andy_J_Robinson at blueyonder.co.uk
>2. Tiles at home renders place=city as grey text at zoom=12, which
>means it should be black at zoom=11. But t at h doesn't go that far.
>Instead, zoom=11 is created by lowzoom.pl by scaling down the
>zoom=12 image. The result is that at zoom=11, =10 and =9 you see
>the town names (population 10,000 - 100,000) a lot better than
>city names.
>
>In combination, these wishes suggest that a place=megacity should
>be printed with a very large font, spanning very many tiles.
>This is of course problematic with respect to performance.
>Changing the megacity name would cause many tiles to be rendered.
>And rendering one tile would require a search of a large
>neighborhood (outside the current tile) for any megacities, parts
>of the names of which could touch this tile. Rendering megacity
>names would also only affect zoom levels 7--11, which today aren't
>covered by the proper tiles at home, but by lowzoom.pl. But perhaps
>a list of megacities (there really aren't that many in this world)
>could be extracted from the weekly planet.osm and supplied in svn
>as part of lowzoom.pl ?
>
>By the way, how are place=country names treated today?
>
>
>--
> Lars Aronsson (lars at aronsson.se)
> Aronsson Datateknik - http://aronsson.se
>
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